<u># 用法</u>
<em>沿着向量表示的方向平移</em>
<u># 语法</u>
<em>Object3D</em>.<b>translateOnAxis</b>(<s>axis</s>, <s>distance</s>)
<u># 参数</u>
<s>axis</s> ：		<em>必需，三维向量</em>（<u> new Three.Vector3(0,0,0)</u>）<em>值为0或1</em>
<s>distance</s> ：	<em>必需，平移距离</em>(<u>Number</u>)
<u># 示例</u>
<em>Object3D</em>.<b>translateOnAxis</b>(<s>new Three.Vector3(1,0,0)</s>, <s>100</s>)		<em>// x 轴上平移</em>
<em>Object3D</em>.<b>translateOnAxis</b>(<s>new Three.Vector3(1,1,0)</s>, <s>100</s>)		<em>// x,y 轴上平移</em>
<em>Object3D</em>.<b>translateOnAxis</b>(<s>new Three.Vector3(1,1,1)</s>, <s>100</s>)		<em>// x,y,z 轴上平移</em>